Problem linking mysqlclient and loading libphp4.so

Hi, I encountered a few frustrating problems while installing PHP4(with apache 1.3.12, mysql 3.2.32, mod_ssl) on my mandrake box. (I still remembered my installation of php3 was way smoother). Hopefully someone here could give me some advice: 1) Error linking mysqlclient. I install mysql using the binary dist. When configuring and 'making' php, it seems that the configure script keep looking for 'mysqlclient' in /usr/local/mysql/lib/mysql, when all the while it's in /usr/local/mysql/lib. (I think that's due to the difference in layout btwn source & binary installation of mysql). Eventually, i change all reference to "lib/mysql" in the configure script to "/lib", and the installation manage to complete. What is the correct way of fixing this error? 2) When i start to run apache, it complains of this error: 'Cannot load .../libexec/libphp4.so into server: .../libexec/libphp4.so: undefined symbol: isfinite.' However, the installation completed without any complaints. Thanks in advance. Regards, Jonathan